Ashton Kutcher yelled for vodka as he languished naked in a hot tub with four similarly bare young women, according to a witness present at the actor's lavish San Diego hotel suite on the night he is alleged to have cheated on wife Demi Moore.

The 33-year-old actor should've been preparing to celebrate his sixth wedding anniversary with Moore, 48.

But instead he enjoyed the company of 23-year-old Texan Sara Leal, with whom he is alleged to have had sex that night in his suite.

Regret: Kutcher looked sombre yesterday as he left the Warner Brothers lot in Hollywood in his Lexus

Party pad: The Diamond Suite at the Hard Rock Hotel in San Diego, where Ashton Kutcher partied on the 23rd September

Jacques Du Toit, a South African yacht worker, described the sordid scene at the £2,500-a-night ‘top of the rock’ Diamond Suite at the Hard Rock Hotel, to a friend.

Du Toit told close friend Gavin Naumoff, 23 , how he hot-footed to the 1,200 sq ft suite, which features an outdoor jacuzzi, after his girlfriend told him she was attending a party in Kutcher's suite on September 23rd.

'He was concerned,' explained party promoter Naumoff to the Mail on Sunday.

Party girl: Sara Leal poses with a friend in a bikini top

'Jacques
is the boyfriend of one of the girls partying with Sara that night,
Alexis. He wanted to make sure she was behaving herself.'

But The Mail revealed that it
was the pretty blonde from small town McAllen in Texas, who stayed
behind that night, before going on to uncover the humble origins that
propelled her into the seedy set-up with the married millionaire.

Naumoff recalled the scene that night as Du Toit painted it: 'Alexis told him Ashton’s room number and
when he got there, a bodyguard was at the door who said it was a private
party. Jacques explained he was the boyfriend of one of the girls and
was let in.

‘He found Ashton in a hot tub on the
balcony with Alexis, Sara, a girl called Katie and another girl called
Marta. They were all naked. Ashton invited Jacques to join them in the
tub.

Debauchery: according to a witness, Ashton was calling for vodka inside his lavish suite that night

The bedroom: This is where Ashton will have laid his head that night, on the 12th floor of the complex

Room with a view: From the main lounge area you can see out to the terrace where the hot tub action is said to have taken place

Apparently, Ashton said, 'Yo,
where’s the vodka at?' and Jacques was like, ‘'It’s over there but I’m
not going to get it.' So Ashton gets out to get the vodka and that’s
when Jacques saw he was butt naked.’

The alleged sexual encounter took place that night after everyone except Sara and her friend Marta had left.

‘Sara is telling everyone 100 per cent that she and Ashton had sex,’ claimed Naumoff.

‘Jacques and Alexis are two of my
best friends and Sara is a good friend. If she says she slept with him
then I think she’s telling the truth.’

Party girl: Sara Leal knows what she wants according to friends, and loves to have a wild time

Naumoff, who arranges for good looking girls to be shipped to certain hotspots, also told the newspaper: 'Sara’s a great girl. My job is to round up hot girls and bus them into clubs in San Diego or Vegas.

The girls get free booze, food, whatever, and they attract rich and famous guys to the clubs. It’s a two-way street. The girls get to meet rich men and the guys get what they want.’

Which is? ‘Sex, obviously.’

Pointing proudly to photographs he took recently of a topless Leal, he bragged: ‘She was off her head, we all were. She’s a wild girl and loves to party. She is someone who knows what she wants and is determined to get it.’

Another friend, this time from her schooldays in McAllen, on the border of Mexico in Texas, said that Sara 'hoped to find a richer older guy to take care of her. She wasn’t great at anything in particular that would have enabled her to make it on her own. But she was good at looking good.'

Leal is yet to speak out publicly about the alleged incident but she has already retained a high powered attorney. He has so far declined to respond to any media calls about his client.

She is reportedly letting it be known that she won't 'spill the beans' on Kutcher for less than $250,000, but is hoping she will receive a similar offer from Kutcher to fade away.

Naumoff explained how earlier in the evening, the Two and a Half Men star selected girls at Fluxx nightclub : 'Ashton was picking out girls who were 'hot tub worthy or not.' He would send his friends to hand-pick the
prettiest girls from the dancefloor.’

The club’s promoter, Aaron Klose, said: ‘I saw Ashton dancing with several girls, including Sara. Fluxx has the reputation for only allowing the prettiest ones in. Ashton was clearly up for a good night.’

Katie Boggus, a friend of Leal’s from Texas, who allegedly took part in the hot tub high jinks, refused to be drawn on the subject when approached at her San Diego home late Friday by the Mail on Sunday.

The pretty blonde said: ‘Sara is a great person. It’s really sad people are saying mean things about her.’

When asked directly if Leal slept with Kutcher that night, she said: ‘I can’t talk about that.’ Asked about being in the hot tub with a naked Kutcher, she smiled and said: ‘I’m sorry, I can’t say anything about that.’

According to another girlfriend of Leal, she is ‘keeping low’.

Painful times: Ashton and Demi both arrived at the Kabbalah centre in LA on Friday to celebrate Rosh Hashannah

Arm in arm: Ashton pictured with Demi back in May at an event in Los Angeles